Three workers have been killed following a seismic incident at Harmony Gold’s Kusasalethu mine near Carletonville, west of Johannesburg in South Africa. 

Workers were carrying out operations at the mine when around 3,100m of ground fell below the surface. 

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more

It is understood that two other miners have yet to be located, with rescue operations by the company’s employees and volunteers underway at the site. 

Harmony Gold CEO Peter Steenkamp said: "Our sincerest condolences go to the family and friends of the deceased. We will not rest until the other two employees have been found and brought to surface."  

The company said that ground conditions have proven challenging for rescue operations. Activities at the mine were immediately suspended following the incident on 25 August. 

"The company said that ground conditions have proven challenging for rescue operations."

Harmony is being assisted by personnel from South Africa's Department of Mineral Resources (DMR) inspectorate and the Association of Mineworkers and Construction Union (AMCU). 

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

The company operates nine underground mines, with one open-pit site and several surface operations in the country. 

Located 90km from Johannesburg, Kusasalethu is in the West Witwatersrand Basin and carries out mining at the Ventersdorp Contact Reef, which is its main ore body. 

Mining at the site is conducted at a depth of 3,388m, according to the company. 

Around 124,198oz of gold at 5.78g/t was produced at the mine in the 2016 financial year, where two fatalities were reported. 

Mining Technology Excellence Awards - Nominations Closed

Nominations are now closed for the Mining Technology Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact

Excellence in Action
Dual-award winner in the 2025 Mining Technology Excellence Awards, Propeller is redefining geospatial intelligence and safety in mining. Explore how its AeroPoints and DirtMate solutions deliver survey-grade mapping, live haul metrics, and safer, more efficient operations across mines and quarries worldwide.

Discover the Impact